[LU-14549] getxattr for lustre.lov and trusted.lov sometimes wrong after mirror split

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Labels: bjhpflr
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: John Hammond

Description

4/10 times running the following I see the old layout returned from getfattr:

rm -f f0
echo XXX > f0
lfs mirror extend -N -p fast f0
cat f0
lfs mirror split --delete --pool=fast f0
getfattr -n trusted.lov -e text --only-values f0 | hexdump -C
lfs getstripe f0

# rm -f f0
# echo XXX > f0
# lfs mirror extend -N -p fast f0
# cat f0
XXX
# lfs mirror split --delete --pool=fast f0
# getfattr -n trusted.lov -e text --only-values f0 | hexdump -C
00000000  d0 0b d6 0b 20 01 00 00  02 00 00 00 01 00 02 00  |.... ...........|
00000010  01 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  01 00 01 00 10 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  ff ff ff ff ff ff ff ff  80 00 00 00 38 00 00 00  |............8...|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000050  01 00 02 00 10 00 00 00  00 00 00 00 00 00 00 00  |................|
00000060  ff ff ff ff ff ff ff ff  b8 00 00 00 48 00 00 00  |............H...|
00000070  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000080  d0 0b d1 0b 01 00 00 00  00 00 00 00 00 00 00 00  |................|
00000090  00 00 00 00 00 00 00 00  00 00 10 00 01 00 00 00  |................|
000000a0  23 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |#...............|
000000b0  00 00 00 00 01 00 00 00  d0 0b d3 0b 01 00 00 00  |................|
000000c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000d0  00 00 10 00 01 00 00 00  66 61 73 74 00 00 00 00  |........fast....|
000000e0  00 00 00 00 00 00 00 00  24 00 00 00 00 00 00 00  |........$.......|
000000f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000120
# lfs getstripe f0
f0
  lcm_layout_gen:    3
  lcm_mirror_count:  1
  lcm_entry_count:   1
    lcme_id:             65537
    lcme_mirror_id:      1
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 1
      lmm_objects:
      - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x23:0x0] }

Issue Links

• has to be finished together with: LU-14526 SoM xattr not updated after mirror split